Tectonic and Seismotectonic Study of the Southern Sierra Nevada, California, Using Seismograms from a Temporary Network

使用临时网络的地震图对加利福尼亚州内华达山脉南部进行构造和地震构造研究

• 批准号: 8915744
• 负责人: Hiroo Kanamori
• 金额: $ 6.15万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-01 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8915744&HistoricalAwards=false
• 关键词: Tectonic; Seismotectonic; Study; Southern; Sierra

This research involves determination of the structure of the lower crust and upper mantle beneath the southern High Sierra of California. The arrival times of four hundred teleseisms recorded by a temporary network of 17 stations deployed in the area and the permanent stations of the Southern California Seismic Network will be inverted for velocity structure. Further analysis will involve the possible identification of converted phases generated at interfaces within the lithosphere and the combination of Pn with teleseismic arrival times to separate anomalies in the crust and mantle. Constraining the lithospheric structure of the Sierra may resolve the cause of the Neogene uplift of the High Sierra and improve our understanding of the tectonics of mountain ranges in extending, seismically active regions. This work is a component of the National Earthquake Hazard Reduction Program.

这项研究包括确定加利福尼亚南部高山下地壳和上地幔的结构。部署在该地区的17个临时台站和南加州地震台网的永久台站记录的400次远震到达时间将根据速度结构进行反转。进一步的分析将涉及岩石圈内界面产生的转换相的可能识别，以及Pn与远震到达时间的结合，以分离地壳和地幔的异常。限制西拉岩石圈结构可以解决西拉高原新近纪隆升的原因，提高我们对伸展的地震活跃区山脉构造的认识。这项工作是国家减少地震危害计划的一个组成部分。